Model Watch · Anthropic
The $2 and $10 was billed as introductory pricing until the end of August. Anthropic made it permanent instead, so the increase everyone budgeted for isn't coming.
Claude Sonnet 5 is a model from Anthropic, built in the US. It's out, and you can call it today.
Anthropic released it on 30 June 2026. That date comes from the lab's own docs.
The tracker first logged the name on 30 June 2026 and last saw it on 3 September 2026.
| Lab | Anthropic |
|---|---|
| Built in | US |
| Status | released |
| API model id | claude-sonnet-5 |
| Released | 30 June 2026 |
| Context window | 1M tokens |
| Max output | 128K tokens |
| Input, per 1M tokens | $2.00 |
| Output, per 1M tokens | $10.00 |
List prices per million tokens, read off the lab's own docs. Caching, batching and volume deals all cut the real number, so treat this as the ceiling. Check the source before you budget against it.
| Model | Status | Date | Context | In / 1M | Out / 1M |
|---|---|---|---|---|---|
| Claude Sonnet 5 | released | 30 June 2026 | 1M tokens | $2.00 | $10.00 |
| Claude Mythos 5.1 | released | 1 September 2026 | 1M tokens | $10.00 | $50.00 |
| Claude Fable 5.1 | released | 1 September 2026 | 1M tokens | $10.00 | $50.00 |
| Claude Opus 5 | released | 24 July 2026 | 1M tokens | $5.00 | $25.00 |
| Claude Fable 5 | released | 9 June 2026 | 1M tokens | $10.00 | $50.00 |
| Claude Opus 4.5 | released | 24 November 2025 | 200K tokens | $5.00 | $25.00 |
| Claude Haiku 4.5 | released | 15 October 2025 | 200K tokens | $1.00 | $5.00 |
| Claude Sonnet 4.5 | released | 29 September 2025 | 200K tokens | $3.00 | $15.00 |
| Claude Opus 5.1 | rumoured | — | — | — | — |
| Claude Opus 4.1 | deprecated | — | — | $15.00 | $75.00 |
A dash means the lab hasn't published that number for that model.
We tracked 4 public discussions naming Claude Sonnet 5 across r/ClaudeAI and r/ClaudeCode between 12 August 2026 and 4 September 2026.
The subject that came up most was what it costs. A discussion can cover several, so these add up to more than 4.
| What people are discussing | Threads |
|---|---|
| what it costs | 1 |
Every tracked post, release, changelog entry or incident whose title or summary names Claude Sonnet 5. Newest first, each one linking to where the lab published it.
Sep 3 , 12:56 UTC Resolved - This incident has been resolved. Sep 3 , 12:47 UTC Monitoring - A fix has been implemented and we are monitoring the results. Sep 3 , 12:37 UTC Investigating - We are investigating elevated errors on requests to Claude Sonnet 5. We will provide an update as soon as possible.
Sep 2 , 21:44 UTC Resolved - The issue affecting Claude Sonnet 5 has been resolved. Impact occurred from 2:05pm PT / 21:05 UTC to 2:19pm PT / 21:19 UTC. Sep 2 , 21:17 UTC Investigating - We are investigating elevated errors on requests to Claude Sonnet 5. We will provide an update as soon as possible.
Aug 18 , 19:01 UTC Resolved - The issue affecting Claude Opus 5 has been resolved. Impact occurred from 16:11 to 18:23 UTC. Aug 18 , 18:26 UTC Monitoring - A fix has been implemented and we are monitoring the results. Aug 18 , 17:12 UTC Update - We are investigating elevated errors on requests to Claude Opus 5. We will provide an update as soon as possible. Aug 18 , 16:20 UTC Update - We are investigating elevated errors on requests to Claude Mythos 5, Claude Fable 5, Claude Opus 5, Claude Sonnet 5, Claude Haiku 4.5, and other Claude models. We will provide an update as soon as possible. Aug…
Aug 17 , 15:29 UTC Resolved - This incident has been resolved. Aug 17 , 14:39 UTC Monitoring - A fix has been implemented and we are monitoring the results. Aug 17 , 14:25 UTC Update - Claude Opus 5 is operational. Claude Sonnet 5 is degraded. We are investigating. Aug 17 , 13:56 UTC Investigating - We are investigating elevated errors on requests to Claude Opus 5. We will provide an update as soon as possible.
Aug 13 , 16:08 UTC Resolved - The issue affecting Claude Mythos 5 and Claude Fable 5 has been resolved. Aug 13 , 15:44 UTC Update - We are investigating elevated errors on requests to Claude Mythos 5 and Claude Fable 5. We will provide an update as soon as possible. Aug 13 , 14:33 UTC Investigating - We are investigating elevated errors on requests to Claude Mythos 5, Claude Fable 5, and Claude Sonnet 5. We will provide an update as soon as possible.
Sonnet 5 delivers frontier performance across coding, agents, and professional work at scale.
The release timeline is every model we know about, filterable by lab, country and date. The tracker is the live feed these mentions come from, and Model Watch is the whole catalogue on one page.
More from Anthropic:
.